l notes are the old notes! DO NOT USE! Battery Polarity
Batteries have 2 poles; positive and negative. Positive is called carbon anode. Negative is called zinc cathode. This is only for dry celled batteries though. Wet cells were bottles with liquid inside that had to be handled well to avoid spillage.
Earth's Magnetic Field Earth's Magnetic Field In a Nutshell:
The field is caused by swirling iron in the outer core. This causes a magnetic field with a north and south pole, just like a magnet only without one. The North and South poles are 2 things: geographic points where the imaginary axis goes through. The 2nd one is the magnetic pole. These poles are close, but not the geographic ones. That means compasses are always pointing to the magnetic poles, not the geographic, which could be quite a problem near either pole. Either way the field attracts a compass toward the north or south pole; depending on which hemisphere you are in. Then you can tell which direction the magnet's is pointing.
Circuit Theory:
The theory of work being able to be accomplished by routing matters through a loop.
The three types of matter used:
electronic or electrical circuits(electrons and charged ions)
pneumatic circuits: compressed gas
hydraulic circuits: pressured liquids
Ohm's Law:
I(current)=V(Voltage)/R(Resistance)
boldsymbol{J} = sigma boldsymbol{E},
Where J is the density at any moment of any resistant material, E is the electric field at that location, and σ is a material dependent parameter called the conductivity.
Ampere:
An ampere, usually known as an amp, is an SI base unit. It is named after André-Marie Ampère, one of the main discoverers of electromagnetism. It is a measure of the amount of electric charge that passed under a point in a certain amount of time. Around 6.242 × 10^18 electrons passing a given point each second constitutes one ampere.
Basic DC Circuit Theory
Circuit Symbols
Wet and Dry Cells
Circuit Theory
Electromagnetic principles
Use of Electromgnets
Magnetism
l notes are the old notes! DO NOT USE!
Battery Polarity
Batteries have 2 poles; positive and negative. Positive is called carbon anode. Negative is called zinc cathode. This is only for dry celled batteries though. Wet cells were bottles with liquid inside that had to be handled well to avoid spillage.
Earth's Magnetic Field
Earth's Magnetic Field In a Nutshell:
The field is caused by swirling iron in the outer core. This causes a magnetic field with a north and south pole, just like a magnet only without one. The North and South poles are 2 things: geographic points where the imaginary axis goes through. The 2nd one is the magnetic pole. These poles are close, but not the geographic ones. That means compasses are always pointing to the magnetic poles, not the geographic, which could be quite a problem near either pole. Either way the field attracts a compass toward the north or south pole; depending on which hemisphere you are in. Then you can tell which direction the magnet's is pointing.
Circuit Theory:
The theory of work being able to be accomplished by routing matters through a loop.
The three types of matter used:
Ohm's Law:
I(current)=V(Voltage)/R(Resistance)Ampere:
An ampere, usually known as an amp, is an SI base unit. It is named after André-Marie Ampère, one of the main discoverers of electromagnetism. It is a measure of the amount of electric charge that passed under a point in a certain amount of time. Around 6.242 × 10^18 electrons passing a given point each second constitutes one ampere.http://www.electronics-tutorials.ws/capacitor/cap_7.html